In the world of safety, many accidents occur because people assume they fully understand how to respond or use equipment during an emergency. After reviewing some high-profile incidents, it becomes clear that their assumptions are often incorrect.
Recently, an end user reached out to the Fluid Sealing Association (FSA) regarding the calculation of flush pressure for a slurry pump. The pump manufacturer directed the engineer to set flush pressure 1 bar—14 pounds per square inch (psi)— above the discharge pressure on the pump. This kind of directive is often due to limited knowledge of the system. While it may seem like a safe assumption for a broad set of applications, this actually can lead to shorter packing life and more downtime for the plant. For this particular end user, there was the added issue of obtaining the required pressure in the plant.
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